Automatic lubricator



Dec. 19, 1-933. J. w. ARNOLD AUTOMATIC LUBRICATOR Filed April 25, 1930INVENTOR.

Jan/v W ARNOLD A TTORNEYS.

Patented Dec. 19, 1933 TIES PATENT when AUTOMATIC LUBRICATOR John W.Arnold, San-Francisco, Calif. Application April 25, 1930. Serial No.447,274 6 Claims. (01. 1349-55) 7 r erally at 4; Figure 2 shows theconstruction of the lubricator. A casing 5 is provided, and this.

has a U-shaped, air passageway 6 that leads from i an inlet 8 to anoutlet'l. Theoutlet is threaded,

My invention relates to improvements in automatic lubricators, and it:consists in the combinations, constructions and arrangementshereinafterdescribed and claimed.

An object of my invention is to provide an automatic lubricator that isan improvement over my automatic lubricator shown in my Patent No.1,582,368 issued April 27, 1926. i

In the present device I have simplified the 10 parts and have reducedthem to five main parts.

Furthermore, the device is designed so as to be filled by an oil gun,and during the filling the outlet to the oil reservoir is closed whilean air outlet is opened for permittingexcess air to leave thereservoir'while the reservoir is being filled with oil. a i

The device makes use of a removable reservoir,

and a number of different ones may be used each having openings ofadifferent size, and in this way a predetermined quantity of oil may bedelivered to the gun over a certain time period. If a light oil is used,the opening may be smalhand vice versa if the ,oil used is heavy, Alsotemperature conditions may be takeninto account and the outlet openingsof the reservoirmay be varied in size in accordance with workingconditions, i

I provide novel means for causing all of the air delivered to the hammeror other airtool'to passby the oil outlet opening, and in thisway 3Q,the air is used for carrying all of'the oilto the working parts. I a i iOther objects andadvantages will appear as the specification proceeds,and the novel features of the device will be particularly pointed out inthe claims hereto annexed. My invention is. illustrated in theaccompanying drawing, in which:

Figure 1 is a side elevation of an airtool showing my device operativelyapplied thereto,

' device,

Figure 3 is a section along the line 3--3 of Figure 2,

v Figure 4 is a section along the line 4--4 of Figure 2, and

Figure 5 is a vertical section through a part of the device.

In carrying out my invention I make use of an air tool such as an airhammer indicated generally at 1. An air hose 2 leads from the source or"air supply (not shown) to the hammer, and the flow ofair into the hammeris controlled by a trigger 3.

Between the air hose and the hammer I dispose Figure 2 is a longitudinalsection through the my automatic lubricator which is indicated genuponthe air inlet 9 of the air gun, and is connected thereto by a coupling10. Thecouplingll) permits the lubricator 4 to remain ina verticalconvenient for the operator.

The. Vertical positioning of thelubricator assures a uniform'fiow of theoil .froinareceptacle11 into the passage-{,- The air hose 2 is connectedto the inlet 8. It will be noted from"Figur-es 2a11d3that. the oilreceptacle 11 is threaded onto alcover member 12 that'in turn isthreaded into the top of the casing 5. Thereceptacle has an outletopening 131 for permitting ,oil ,to flow from the receptacle into thepassageway 6. The rate of flow of the lubricating fluid from thereceptacle can'be regulatedby the size of the opening 13., It is forthis reason that -I provide a number of receptacles all identical inconstruction ex-v cept for the size of the openings 13. "There--ceptacles may be quickly changed, and by this change the amount oflubricating fluid admitted to the gun can be regulated. H A novel doublevalve member indicated 1 way ,6.

generally at 14 (see Figure 5) is provided. 'This a member has acup-shaped portion 15 threaded vided with a conical-shaped valve 18 atits bottom. A spring 19 (see Figure 2) normally holds the valve 14 inthe position shown. When in this position, oil inlet [openings 20 (seeFigures 3 and 5) are uncovered while the conical valve 18 closes theopening 13. The operator, in order to uncover the openings 20, applies'the oil gun. (not shown) to the cup-shaped member 15 and then pressesdownwardly'so as to move the double] valve 14 into the position shown inFigure 3. An annular recess 21 in the under-surface of the cover 12permits the lubricating fluid from the oil gun to pass through theopenings 20 andion into the receptacle 11. The conical valve 18 preventsthe lubricant from flowing out of the bottom of the receptacle. Figure 3shows an air passageway 22 that allows the air in the receptacle 11 to.exhaust therefrom as the receptacle with the lubricating fluid.

permits thespring 19 to move the cup-shaped member 15 upwardly and toclose the openings 20 and 22 A conical-shaped projection 23 limitsinteriorly at16' for receiving an oil gun, and the v double valve, alsohas a plunger portion 1'1 prothe upward movement of the double valve 14and acts as an additional seal for closing the openings and 22.

From the foregoing description of the various 5 parts of the device, theoperation thereof may be readily understood. 7

The air hammer or tool is held in the position shown in Figure 1 when inuse, and the oil in the receptacle 11 will slowly feed into the pas- 1csageway 6 where it will be conveyed by the air flowing through thepassageway into the tool. All of the air passes by the opening 13, andthe speed of the air in passing this opening will tend to mix the oil"leaving the opening 13 and to" is emulsify the oil while conveying, itto the gun. This afiords a perfect lubricationof the working parts. i

When the gun is not in use, it is normally laid so that the handle 24,(see Figure l) occupies a 23 horizontal position. The lubricator isalso swung into a horizontal position and will'swing the axis of theoutlet Opening 13 into the sameposition 1 5,: operative'mechanism. Thispulsation of air I have found increases the uniformity of flow of oilfrom, the receptacle 11 into the passageway 6, The pulsating air flowingthrough the passage 6 entrains oil through the. opening 13 and when the3;: pressure in the cup 11 is less than that in the passa ewayduetoadepleting of the oil, the air will enter the cup through theopening 13.

Although I have shown and described oneembodirnent of my invention, itis tobe understood 4': that the'same is susceptible of, various changes,and I reserve the right to employ such changes as ay come within thescope of the invention as claimed.

I claim: 7

1 A lubricating device, for an, air tool com I prising a casing having aU-shapedair passageway therein, a receptaclefora lubricant and having anopening in its bottom communicating with so for normally keepingthevalve open a cover for the receptacle and casing, said valve having,lubricant inlet openings andan airexhaust openinlet opening therein anda valve controlling the normally keeping the valve open a cover for thereceptacle and casing, said valve having lubricant inlet openings and anair exhaust opening normally closed byithe cover, said valve when closedmoving said valve openings where they wil be uncovered by said cover.

3. In a lubricating device, a casing having a U-shaped groove with aninlet and an outlet, a removable receptacle forming the groove into apassageway and having an opening communicating with the passageway, acover for the casing and for holding the receptacle in position, and avalve for the opening, and having a fluid passage way uncovered by thecover when the opening is closed 'for filling the receptaclewith oil.

4. In alubricating device, a casing, an oil receptacle receivable in thecasing and forming a passageway therewith, said receptacle having a portfor conveying oil to the passageway and a cap threaded into the casingand bearing on the receptacle for closing the same.

5. In a lubricating device, a casing having an opening, an oil cupreceivable throughthe opening, the casing and the oil cup forming apassage therebetween, said cup having a port connecting the oil cup andthe passage, a, common closure for the casing and the cup and having anoil close the same'from the inside, spring means tending to'close thevalve, a conduit in the valve body adapted to be uncovered when thevalve is moved' inwardly for admitting a lubricant into Ithefipassageway, a valve for theopening, a spring the device and arelief passage inthe valve body uncovered by the same movement forallowing 7 air to escape. I

JOHN W. ARNOLD.

